/// <summary>
/// use ConcurrectCollection
/// </summary>
public void Run3()
{
var products = GetProducts();
BlockingCollection <NewProduct> newProducts = new BlockingCollection <NewProduct>();
Console.WriteLine("來源資料筆數:{0}", products.Count());
Console.WriteLine("執行前結果資料筆數:{0}", newProducts.Count());
var watch = new Stopwatch();
watch.Start();
Parallel.ForEach(products, x =>
{
int id = x.Id;
string name = x.Name;
int stock = 100 + x.Id;
var newProduct = new NewProduct()
{
Id = id,
Name = name,
Stock = stock
};
newProducts.Add(newProduct);
});
watch.Stop();
Console.WriteLine("Consume Time: {0} ms", watch.ElapsedMilliseconds);
Console.WriteLine("執行後結果資料筆數:{0}", newProducts.Count());
}
/// <summary>
/// 使用一般List會造成資料遺漏問題
/// </summary>
public void Run()
{
var products = GetProducts();
List <NewProduct> newProducts = new List <NewProduct>();
Console.WriteLine("來源資料筆數:{0}", products.Count());
Console.WriteLine("執行前結果資料筆數:{0}", newProducts.Count());
Parallel.ForEach(products, x =>
{
int id = x.Id;
string name = x.Name;
int stock = 100 + x.Id;
var newProduct = new NewProduct()
{
Id = id,
Name = name,
Stock = stock
};
newProducts.Add(newProduct);
});
Console.WriteLine("執行後結果資料筆數:{0}", newProducts.Count());
}
